MIL-STD-1660A APPENDIX D
D.6 CONDITIONING OF SPECIMEN
D.6.1 Test specimen. Unless otherwise specified (see 6.2), no special conditioning of the test specimen shall be necessary.
D.7 PROCEDURE
The specimen shall be placed on the carriage with the surface or edge which is to be impacted projecting at least 2 inches beyond the front end of the carriage. The carriage shall be brought to a predetermined position on the incline and released. To concentrate the impact at any particular position on the unit load, a 4- by 4-inch timber is attached to the bumper in the desired position before the test. No part of the timber shall be struck by the carriage. The position of the unit load on the carriage and the sequence in which the surfaces and edges are subjected to impacts may be at the option of the testing activity and will depend upon the objective of the tests. When the test is conducted to determine satisfactory performance of a unit load, and unless otherwise specified (see 6.2), the specimen shall be subjected to one impact on each surface that has each dimension less than 9.5 feet. Unless otherwise specified (see 6.2), the velocity at time of impact (which may be assumed equal to twice the average velocity) shall be 7 feet per second. A record shall be made of each impact to show velocity at impact and any changes or breaks in the unit load, such as apparent racking, nail pull, or broken parts and their locations. The packing (blocks, braces, cushions, or other devices) and the contents shall be examined carefully and a record made of their condition. (See figure D-1).
D.8 NOTES
D.8.1 Incline impact test. This test is meant to simulate railroad humping, switching, or other accidental handling impacts. It is intended that the incline impact test shall be used only on unit loads that are susceptible to such accidental impacts. Details are given with the qualification, "unless otherwise specified", in paragraphs regarding:
a. Conditioning of specimens (see D.6).
b. Number and velocity of impacts (see D.7).
FIGURE D-1. Incline impact test.
Source: https://assist.dla.mil -- 3D0ownloaded: 2014-09-28T13:04Z Check the source to verify that this is the current version before use.
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business